Last week Rob Kardashian tried to shoot down reports that his sister Kim's marriage was crumbling (he told Access Hollywood, “My sister is completely happy ... she just got married so she should be happy”), but now that she's filing for divorce, he's singing a different tune.

After working up a sweat on Dancing with the Stars last night, Rob told Access, “My sister and I and everybody are obviously going through a lot right now. We’re all supportive of everything she does and we’re just a very close-knit family. We keep everything private.”

Yesterday it was announced that Kim was filing for divorce from hubby Kris Humphries after just 72 days of marriage, and Khloe, Kris and Kourtney also weighed in on the breakup. Wait, so are they keeping everything private or not?